问题详情

Macdonald had to seek support from the college captains because______.
A．the public imagined he was not competent to command his crew
B．the Chief Coach Topolski lost the experienced American oarsmen
C．the Oxford crew was unlikely to win the Race without the Americans
D．the Americans would leave the squad unless they were to lead it此题为多项选择题。请帮忙给出正确答案和分析，谢谢！